The meaning of DEMENTED is exhibiting madness : marked by thought or action that lacks reason —not used technically. How to use demented in a sentence.

DEMENTED definition: crazy; insane; mad. See examples of demented used in a sentence.

DEMENTED definition: 1. unable to think or act clearly because you are extremely worried, angry, or excited by…. Learn more.

Define demented. demented synonyms, demented pronunciation, demented translation, English dictionary definition of demented. adj. 1. Suffering from dementia. 2. Informal Crazy or foolish. …

If you describe someone as demented, you think that their actions are strange, foolish, or uncontrolled.

Definition of demented adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Dec 14, 2025 · demented (comparative more demented, superlative most demented) Insane; mentally ill. quotations

demented, adj. meanings, etymology, pronunciation and more in the Oxford English Dictionary

Dec 21, 2025 · Discover the comprehensive meaning, etymology, and usage of the term 'demented'. Understand its historical significance, modern-day connotations, synonyms, antonyms, and related …

Demented is an adjective describing behavior that is crazy, unhinged, or insane. Someone is demented when they have gone off the deep end.